GB294242A - Improvements in the manufacture of electric incandescent lamps - Google Patents
Improvements in the manufacture of electric incandescent lampsInfo
- Publication number
- GB294242A GB294242A GB1988928A GB1988928A GB294242A GB 294242 A GB294242 A GB 294242A GB 1988928 A GB1988928 A GB 1988928A GB 1988928 A GB1988928 A GB 1988928A GB 294242 A GB294242 A GB 294242A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bulb
- glass
- filament
- manufacture
- incandescent lamps
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
- H01K3/22—Exhausting, degassing, filling, or cleaning vessels
Abstract
294,242. General Electric Co., Ltd., (Assignees of Patent-Trenhand-Ges. f³r Elektrische Gl³hlampen). July 21, 1927, [Convention date]. Residual gases.-Vacuum lamp bulbs are aged by passing current through the filament to raise .it to incandescence and conducting an electric gas discharge through the glass of the bulb by applying a high potential to an electrode placed on its exterior. The bulb is heated to render it conductive unless it is made of a conductive glass, such as magnesium glass. The external electrode may be mounted on a rod or handle, or it may consist of a tin-foil or other metal coating on the bulb. Either alternating or direct current may be used for both the filament and the discharge currents.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP55705D DE470326C (en) | 1927-07-21 | 1927-07-21 | Process for clear burning of electric vacuum incandescent lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB294242A true GB294242A (en) | 1929-01-17 |
Family
ID=7387941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1988928A Expired GB294242A (en) | 1927-07-21 | 1928-07-09 | Improvements in the manufacture of electric incandescent lamps |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE470326C (en) |
| GB (1) | GB294242A (en) |
-
1927
- 1927-07-21 DE DEP55705D patent/DE470326C/en not_active Expired
-
1928
- 1928-07-09 GB GB1988928A patent/GB294242A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE470326C (en) | 1929-01-11 |
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